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mobile-safarioverflowviewport

Mobile overflow:scroll and overflow-scrolling: touch // prevent viewport "bounce"

On a mobile (Safari, webviews, wherever), overflow:scroll and overflow-scrolling: touch give a pretty smooth scroll, which is cool.

But, it makes the page "bounce" (area circled below), which is not the case when you are not using it, but which makes the experience a little less "native" (and more simply, as far as I can have an opinion about it, is absolutely un-useful)

Is there a way to prevent it to happen?

that kind of suxx

Solution

  • I've managed to find a CSS workaround to preventing bouncing of the viewport. The key was to wrap the content in 3 divs with -webkit-touch-overflow:scroll applied to them. The final div should have a min-height of 101%. In addition, you should explicitly set fixed widths/heights on the body tag representing the size of your device. I've added a red background on the body to demonstrate that it is the content that is now bouncing and not the mobile safari viewport.

    Source code below and here is a plunker (this has been tested on iOS7 GM too). http://embed.plnkr.co/NCOFoY/preview

    If you intend to run this as a full-screen app on iPhone 5, modify the height to 1136px (when apple-mobile-web-app-status-bar-style is set to 'black-translucent' or 1096px when set to 'black'). 920x is the height of the viewport once the chrome of mobile safari has been taken into account).

    <!doctype html>
<html>

<head>
    <meta name="viewport" content="initial-scale=0.5,maximum-scale=0.5,minimum-scale=0.5,user-scalable=no" />
    <style>
        body { width: 640px; height: 920px; overflow: hidden; margin: 0; padding: 0; background: red; }
        .no-bounce { width: 100%; height: 100%; overflow-y: scroll; -webkit-overflow-scrolling: touch; }
        .no-bounce > div { width: 100%; height: 100%; overflow-y: scroll; -webkit-overflow-scrolling: touch; }
        .no-bounce > div > div { width: 100%; min-height: 101%; font-size: 30px; }
        p { display: block; height: 50px; }
    </style>
</head>

<body>

    <div class="no-bounce">
        <div>
            <div>
                <h1>Some title</h1>
                <p>item 1</p>
                <p>item 2</p>
                <p>item 3</p>
                <p>item 4</p>
                <p>item 5</p>
                <p>item 6</p>
                <p>item 7</p>
                <p>item 8</p>
                <p>item 9</p>
                <p>item 10</p>
                <p>item 11</p>
                <p>item 12</p>
                <p>item 13</p>
                <p>item 14</p>
                <p>item 15</p>
                <p>item 16</p>
                <p>item 17</p>
                <p>item 18</p>
                <p>item 19</p>
                <p>item 20</p>
            </div>
        </div>
    </div>

</body>

</html>